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Report No.

Flow injection extraction chromatography with ICP-MS for thorium and uranium determination in human body fluids

Tolmachyov, S.; Kuwabara, Jun* ; Noguchi, Hiroshi

A method based on flow injection extraction chromatography coupled with on-line ICP-MS (FI-EC-ICPMS) for simultaneous thorium and uranium determination in human body fluids (urine and blood) has been developed and validated. By using extraction chromatography, the limits of detection for $$^{232}$$Th, $$^{235}$$U and $$^{238}$$U were achieved 0.06 ng l$$^{-1}$$, 0.0014 ng l$$^{-1}$$ and 0.05 ng l$$^{-1}$$, respectively. The FI-EC-ICPMS method accuracy was 102.4% and 101.5% with overall precision (RSDmax at 95% CI) of 5.3% and 4.9% for $$^{232}$$Th and $$^{238}$$U, respectively. The $$^{235}$$U/$$^{238}$$U atom ratio is measured with 1.8% precision. The technique was employed for simultaneous thorium and uranium analyses in human urine and blood samples after microwave digestion.



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Category:Chemistry, Analytical



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